Bleeding under temporary crown, what can i do for this?

Should not be: Bleeding. Would recommend returning to your dentist for evaluation. He might want to prescribe a chlorohexadine rinse. Hope this helps.

Bleeding: If you are truly bleeding below your crown then you need to see your dentist to find out where it's coming from. If there was a root canal then there could be a failure, or if not a pulp exposure. If it is your gums bleeding up under, you need to keep it cleaner but need he crown sealed better to prevent recurring decay. See your dentist asap.

Brush and floss: Sometimes there is inflammation and bleeding around a temporary crown. Brush gently and floss as your dentist instructed you. Warm salt water rinses will help the area heal. Ibuprofen will help ease your pain. Call your dentist if the bleeding. Or pain lingers.

Open margin?: The temporary may not be all the way down on your tooth or might not fit perfectly. See you dentist about your symptoms. Another very unlikely cause may be, if your dentist uses cords to separate your gum from your tooth in order to take an impression, a small piece of cord may remain under your gum.

Need permanent crown: The best of temporaries do not fit as accurately as a laboratory or milling machine crown. By definition a temporary crown is temporary. Because if irregularities at the margins or edges of temporary crowns, plaque accumulates and gingivitis is common. The solution is to get a permanent crown which fit more accurately